<div class="border-item">
    <div class="line-top-left">
        <span class="line-span"></span>
    </div>
    <div class="line-top-right"></div>
    <div class="line-bottom-left"></div>
    <div class="line-bottom-right">
        <span class="line-span"></span>
    </div>
    <div class="line-left-top">
        <span class="line-span"></span>
    </div>
    <div class="line-left-bottom">
        <span class="line-span"></span>
    </div>
    <div class="line-right-top">
        <span class="line-span"></span>
    </div>
    <div class="line-right-bottom">
        <span class="line-span"></span>
    </div>
    <slot></slot>
</div>